Greetings, I have had extensive experience with WP All Importer and rank within the top 3% of wordpress developers here on Freelancer. I also have over 24 years programming experience so I can get your site importing those xml feeds correctly as per your specifications.
If you would have a look at my recent feedback, the comment from raka777 from a few weeks ago was a recent project where I used WP All Importer to map and process large import files. You will see by his feedback that he was extremely happy with the job that I did.
Please feel free to open a chat window with any questions you might have.
Thanks,
Brett